Autosomal Dominant Hereditary Ataxia
It is possible that the main title of the report Autosomal Dominant Hereditary Ataxia is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
- dentato-rubro-pallido-luysian atrophy
- episodic ataxia
- progressive cerebellar ataxia, familial
- spinocerebellar ataxia
The hereditary ataxias are a group of neurological disorders (ataxias) of varying degrees of rarity that are inherited, in contrast to a related group of neurological disorders that are acquired through accidents, injuries, or other external agents. The hereditary ataxias are characterized by degenerative changes in the brain and spinal cord that lead to an awkward, uncoordinated walk (gait) accompanied often by poor eye-hand coordination and abnormal speech (dysarthria). Hereditary ataxia in one or another of its forms may present at almost any time between infancy and adulthood.
The classification of hereditary ataxias is complex with several schools of thought vying for recognition. This report follows the classification presented by Dr. Thomas D. Bird and the University of Washington's GeneReviews.
This classification is based on the pattern of inheritance or mode of genetic transmission of the disorder: i.e., autosomal dominant, autosomal recessive and X-linked. The autosomal dominant ataxias, also called the spinocerebellar ataxias, are usually identified as SCA1 through SCA37. Also included are several "episodic ataxias", as well as a very rare disorder known as DRPLA (dentato-rubro-pallido-luysian atrophy). This report deals with the autosomal dominant hereditary ataxias. There are fewer autosomal recessive hereditary ataxias than autosomal dominant hereditary ataxias, and X-linked forms of ataxia are very rare.
At one time, all autosomal dominant ataxias were called Marie's ataxia and all autosomal recessive ataxias were called Friedreich's ataxia. This is no longer appropriate because there is now much more accurate information about these diseases.
National Ataxia Foundation
2600 Fernbrook Lane Suite 119
Minneapolis, MN 55447
NIH/National Institute of Neurological Disorders and Stroke
P.O. Box 5801
Bethesda, MD 20824
Canadian Association for Familial Ataxias - Claude St-Jean Foundation
3800 Radisson Street Office 110
Quebec, H1M 1X6
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
Movement Disorder Society
555 E. Wells Street
Milwaukee, WI 53202-3823